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Message-ID: <20191218140459.24992-1-ldir@darbyshire-bryant.me.uk>
Date: Wed, 18 Dec 2019 14:05:13 +0000
From: Kevin 'ldir' Darbyshire-Bryant <ldir@...byshire-bryant.me.uk>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: Kevin 'ldir' Darbyshire-Bryant <ldir@...byshire-bryant.me.uk>
Subject: [PATCH net-next v2] sch_cake: drop unused variable tin_quantum_prio
Turns out tin_quantum_prio isn't used anymore and is a leftover from a
previous implementation of diffserv tins. Since the variable isn't used
in any calculations it can be eliminated.
Drop variable and places where it was set. Rename remaining variable
and consolidate naming of intermediate variables that set it.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@...byshire-bryant.me.uk>
---
v2 - rename intermediate 'quantum1' variables to just 'quantum' since
there's only one of them left now. Also rename remaining
tin_quantum_band to tin_quantum since there's now only 1 type of
quantum.
Please drop the v1 patch
net/sched/sch_cake.c | 59 ++++++++++++++------------------------------
1 file changed, 18 insertions(+), 41 deletions(-)
diff --git a/net/sched/sch_cake.c b/net/sched/sch_cake.c
index 53a80bc6b13a..9ce85b97169c 100644
--- a/net/sched/sch_cake.c
+++ b/net/sched/sch_cake.c
@@ -173,8 +173,7 @@ struct cake_tin_data {
u64 tin_rate_bps;
u16 tin_rate_shft;
- u16 tin_quantum_prio;
- u16 tin_quantum_band;
+ u16 tin_quantum;
s32 tin_deficit;
u32 tin_backlog;
u32 tin_dropped;
@@ -1919,7 +1918,7 @@ static struct sk_buff *cake_dequeue(struct Qdisc *sch)
while (b->tin_deficit < 0 ||
!(b->sparse_flow_count + b->bulk_flow_count)) {
if (b->tin_deficit <= 0)
- b->tin_deficit += b->tin_quantum_band;
+ b->tin_deficit += b->tin_quantum;
if (b->sparse_flow_count + b->bulk_flow_count)
empty = false;
@@ -2240,8 +2239,7 @@ static int cake_config_besteffort(struct Qdisc *sch)
cake_set_rate(b, rate, mtu,
us_to_ns(q->target), us_to_ns(q->interval));
- b->tin_quantum_band = 65535;
- b->tin_quantum_prio = 65535;
+ b->tin_quantum = 65535;
return 0;
}
@@ -2252,8 +2250,7 @@ static int cake_config_precedence(struct Qdisc *sch)
struct cake_sched_data *q = qdisc_priv(sch);
u32 mtu = psched_mtu(qdisc_dev(sch));
u64 rate = q->rate_bps;
- u32 quantum1 = 256;
- u32 quantum2 = 256;
+ u32 quantum = 256;
u32 i;
q->tin_cnt = 8;
@@ -2266,18 +2263,14 @@ static int cake_config_precedence(struct Qdisc *sch)
cake_set_rate(b, rate, mtu, us_to_ns(q->target),
us_to_ns(q->interval));
- b->tin_quantum_prio = max_t(u16, 1U, quantum1);
- b->tin_quantum_band = max_t(u16, 1U, quantum2);
+ b->tin_quantum = max_t(u16, 1U, quantum);
/* calculate next class's parameters */
rate *= 7;
rate >>= 3;
- quantum1 *= 3;
- quantum1 >>= 1;
-
- quantum2 *= 7;
- quantum2 >>= 3;
+ quantum *= 7;
+ quantum >>= 3;
}
return 0;
@@ -2346,8 +2339,7 @@ static int cake_config_diffserv8(struct Qdisc *sch)
struct cake_sched_data *q = qdisc_priv(sch);
u32 mtu = psched_mtu(qdisc_dev(sch));
u64 rate = q->rate_bps;
- u32 quantum1 = 256;
- u32 quantum2 = 256;
+ u32 quantum = 256;
u32 i;
q->tin_cnt = 8;
@@ -2363,18 +2355,14 @@ static int cake_config_diffserv8(struct Qdisc *sch)
cake_set_rate(b, rate, mtu, us_to_ns(q->target),
us_to_ns(q->interval));
- b->tin_quantum_prio = max_t(u16, 1U, quantum1);
- b->tin_quantum_band = max_t(u16, 1U, quantum2);
+ b->tin_quantum = max_t(u16, 1U, quantum);
/* calculate next class's parameters */
rate *= 7;
rate >>= 3;
- quantum1 *= 3;
- quantum1 >>= 1;
-
- quantum2 *= 7;
- quantum2 >>= 3;
+ quantum *= 7;
+ quantum >>= 3;
}
return 0;
@@ -2413,17 +2401,11 @@ static int cake_config_diffserv4(struct Qdisc *sch)
cake_set_rate(&q->tins[3], rate >> 2, mtu,
us_to_ns(q->target), us_to_ns(q->interval));
- /* priority weights */
- q->tins[0].tin_quantum_prio = quantum;
- q->tins[1].tin_quantum_prio = quantum >> 4;
- q->tins[2].tin_quantum_prio = quantum << 2;
- q->tins[3].tin_quantum_prio = quantum << 4;
-
/* bandwidth-sharing weights */
- q->tins[0].tin_quantum_band = quantum;
- q->tins[1].tin_quantum_band = quantum >> 4;
- q->tins[2].tin_quantum_band = quantum >> 1;
- q->tins[3].tin_quantum_band = quantum >> 2;
+ q->tins[0].tin_quantum = quantum;
+ q->tins[1].tin_quantum = quantum >> 4;
+ q->tins[2].tin_quantum = quantum >> 1;
+ q->tins[3].tin_quantum = quantum >> 2;
return 0;
}
@@ -2454,15 +2436,10 @@ static int cake_config_diffserv3(struct Qdisc *sch)
cake_set_rate(&q->tins[2], rate >> 2, mtu,
us_to_ns(q->target), us_to_ns(q->interval));
- /* priority weights */
- q->tins[0].tin_quantum_prio = quantum;
- q->tins[1].tin_quantum_prio = quantum >> 4;
- q->tins[2].tin_quantum_prio = quantum << 4;
-
/* bandwidth-sharing weights */
- q->tins[0].tin_quantum_band = quantum;
- q->tins[1].tin_quantum_band = quantum >> 4;
- q->tins[2].tin_quantum_band = quantum >> 2;
+ q->tins[0].tin_quantum = quantum;
+ q->tins[1].tin_quantum = quantum >> 4;
+ q->tins[2].tin_quantum = quantum >> 2;
return 0;
}
--
2.21.0 (Apple Git-122.2)
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